So I was riding, and a branch got caught in between my rear cog and the chain. Broke ONE chain link. Do I need to replace the ENTIRE chain or can I just insert ONE chain link?
Inspect the chain, visually and determine if it is just one link that is twisted/broken. If it is, you can easily just remove that section and replace with a quicklink/masterlink type connector. You'll also need to tell us what chain you are using and the speed.
Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.